当他们遇到麻烦的时候，他们不知道该做什么。

They don't know what to do when they are in trouble.

youdao

“我知道他们。”约翰说话的时候让他们感到不愉快。

"I knew them," John said, to annoy the others.

youdao

重点是他们都知道什么，是什么时候知道的。

It's about what they knew and when they knew it.

youdao

Every time they're changing You know everytime I say change, and eventually you will be hearing there's the same change, too.

他们变化的时候,你知道当我说,变,的时候,你听到的音乐也随之改变了

耶鲁公开课 - 聆听音乐课程节选

When they look at the price of a company, how do we know whether the price at which you're buying is reasonable?

当他们看到公司股价的时候,怎么知道买入的价格是合理的呢

耶鲁公开课 - 金融市场课程节选